<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>ECharts</title>
    <!-- 引入 echarts.js -->
    <script src="echarts.min.js"></script>
</head>
<body >
<!-- 为ECharts准备一个具备大小（宽高）的Dom -->
<div id="main" style="width: 200px;height:220px;"></div>
<script type="text/javascript">
        // 基于准备好的dom，初始化echarts实例

        var myChart = echarts.init(document.getElementById('main'));

        // 指定图表的配置项和数据
option = {
    series: [{
        type: 'gauge',
        startAngle: 180,
        endAngle: 0,
        min: 0,
        max: 80,
        splitNumber: 5,
        itemStyle: {
            color: '#58D9F9',
            shadowColor: 'rgba(0,138,255,0.45)',
            shadowBlur: 10,
            shadowOffsetX: 2,
            shadowOffsetY: 2
        },
        progress: {
            show: true,
            roundCap: true,
            width: 10
        },
        pointer: {
            icon: 'path://M2090.36389,615.30999 L2090.36389,615.30999 C2091.48372,615.30999 2092.40383,616.194028 2092.44859,617.312956 L2096.90698,728.755929 C2097.05155,732.369577 2094.2393,735.416212 2090.62566,735.56078 C2090.53845,735.564269 2090.45117,735.566014 2090.36389,735.566014 L2090.36389,735.566014 C2086.74736,735.566014 2083.81557,732.63423 2083.81557,729.017692 C2083.81557,728.930412 2083.81732,728.84314 2083.82081,728.755929 L2088.2792,617.312956 C2088.32396,616.194028 2089.24407,615.30999 2090.36389,615.30999 Z',
            length: '75%',
            width: 10,
            offsetCenter: [0, '5%']
        },
        axisLine: {
            roundCap: true,
            lineStyle: {
                width: 10
            }
        },
        axisTick: {
            splitNumber: 1,
            lineStyle: {
                width: 1,
                color: '#999'
            }
        },
        splitLine: {
            length: 5,
            lineStyle: {
                width: 3,
                color: '#999'
            }
        },
        axisLabel: {
            distance: 15,
            color: '#999',
            fontSize: 10
        },
        title: {
            show: false
        },
        detail: {
            backgroundColor: '#fff',

            valueAnimation: true,
            formatter: function (value) {
                return '{value|' + value.toFixed(0) + '}{unit|℃}';
            },
            rich: {
                value: {
                    fontSize: 50,
                    fontWeight: 'bolder',
                    color: '#777'
                },
                unit: {
                    fontSize: 40,
                    color: '#999',

                }
            }
        },
        data: [{
            value: 50
        }]
    }]
};


function returnResult(result){

    option.series[0].data[0].value = result;

    myChart.setOption(option);


}
        myChart.setOption(option);
    </script>
</body>
</html>